Peavey Rock Master
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Essential Information About the Peavey Rock Master Ultra Preamp Pedal
Essential Information About the Peavey Rock Master Ultra Preamp Pedal
- High-gain preamp inspired by the "Ultra" channel of the 1990s Peavey Rock Master, delivering modern and powerful distortion
- Highly effective 3-band active EQ with Bottom, Body, and Edge controls for precise tonal shaping
- Two independent gains (Pre Gain / Post Gain) to adjust attack and output level just like a real amp channel
- Boost + Mid Shift via two switches, and silent bypass with anti-click circuitry for stress-free live use
Manufacturer Information
Peavey
https://www.peavey.com
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A '90s Preamp Reimagined in Pedal Format
Peavey has built a solid reputation among guitarists seeking effective saturated tones that remain clear and powerful in a mix. This pedal captures the spirit of the Rock Master's "Ultra" channel from the 1990s and translates it into a pedalboard format, featuring a TransTube reproduction designed to recapture the grain, compression, and bite typical of that era.
Who It's For, Which Styles, and Contexts
This preamp pedal is aimed at guitarists who want an immediately usable rock and metal tone, ranging from tight crunchy overdrive to focused distortion. It suits both intermediate players and seasoned musicians looking for a stable and easy-to-recall tonal foundation. In the studio, it allows you to get straight to the point with precise active EQ; on stage, it provides an "Ultra" channel always at your feet, ideal for a pedalboard focused on heavy riffs and solos.
Controls, Modes, and Design: The Gain Sculpting Tool
The Pre Gain / Post Gain pair enables fine-tuning: increase Pre Gain to thicken saturation and compression, then adjust Post Gain to set your volume. The 3-band active EQ (Bottom, Body, Edge) lets you brighten attacks, fill out low-mids, or tighten the bass depending on your guitar and amp. Two switches complete the setup: a gain boost to cut through the band, and a Mid Shift to move the midrange focus and change the tonal "center." The mechanical hard bypass includes anti-click circuitry for silent switching.
Sound
The saturation is clear, dense, and articulate, with a well-defined attack for palm mutes and full chords. The active EQ delivers a true "amp channel" feel: you can scoop for a modern, cutting sound or boost body and mids for thick leads. The dynamics respond well to playing, and the Pre/Post Gain combination helps you choose between a more compressed grain or a more open saturation without losing level control.
Technical specifications
| Effects | Preamp, Distortion | Type | sector |
| Technology | Analog | Use | electric guitar |
| Format | Pedal | Color | Black |
| EQ | 3 channels | ||
| 3-band active EQ | Bottom, Body, Edge | Patch cables | none |
| 2 switches | gain boost activation, midrange adjustment via Mid Shift | Current draw | 50 mA |
| Power supply | not included (works with 9V adapter or standard 9V battery, not supplied) | Required voltage | 9V |
| Documentation | not specified | ||
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Questions frequently asked
Peavey Rock Master: what type of distortion does this pedal offer?
The TransTube section captures the spirit of the Ultra channel of the 1990s Rock Master, with a thick distortion and a defined attack for palm mutes.
How to adjust the gain and volume on this pedal?
With the Pre Gain and Post Gain controls, it is possible to dose distortion and compression, then adjust the output level. The gain boost switch adds extra gain for parts requiring more presence.
Does the 3-band EQ allow modifying the mids?
The active EQ Bottom, Body and Edge acts on the bass, body of the tone, and attack. The Mid Shift switch changes the midrange frequency area. This feature allows shifting the tonal focus depending on the guitar or amplifier used.
What power supply is required for the Rock Master?
The power supply requires 9 V and 50 mA, via a 9 V adapter or a standard 9 V battery. No adapter or battery is provided.
Is the switching silent on a pedalboard?
The mechanical hard bypass includes a click-free circuit designed to limit switching noise.
